getgid() — Get the real group ID

Standards

Format

#define _POSIX_SOURCE
#include <unistd.h>

gid_t getgid(void);

General description

Finds the real group ID (GID) of the calling process.

Returned value

Returns the real group ID of the calling process. It is always successful.

There are no documented errno values.

Example

⁄* CELEBG07

   This example gets the real group ID.

 *⁄
#define _POSIX_SOURCE
#include <sys⁄types.h>
#include <stdio.h>
#include <unistd.h>

main() {
  printf("my group id is %d\n", (int) getgid());
}

my group id is 500

Related information

• sys/types.h
• unistd.h
• getegid() — Get the effective group ID
• geteuid() — Get the effective user ID
• getuid() — Get the real user ID
• setgid() — Set the group ID